Granted Patent
Utility
US 6,478,674 · App. 09/799,882
Apparatus including twisted blades passing between stationary blades for chopping and discharging straw from a combine harvester
Inventor:
Leo Redekop
Patented Case
View Patent ↗
Granted: Nov 12, 2002
Filed: Mar 7, 2001
Inventor
Leo Redekop
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.